Telegraph-sounder.



A. w. BEAUPRIL TELEGRAPH SOUNDER,

APPLICATION FILED FEB.12' 1916.

Patented May 7,1918.

WWQ/W UNITED STATES PATENT O F C 1* An'moaw. BEAUPRIE, OF'ATLANTA,eEoaerA.

rELEGnAPH-soUNDEB.

To all whom it may concern:

Be it known that I, ARTHUR W. BEAU- PRIE, a citizen of the UnitedStates, residing at Atlanta, in the county of Fulton and State ofGeorgia, haveinvented new and useful Improvements in Telegraph-Sounders,of which the following is a specification.

Thi invention relates to telegraph sounders and has for its primaryobject to construct a sounder capable of being operated by alternatingcurrent.

An object of the invention is to provide a sounder of simpleconstruction capable of being operated by alternating current and inwhich the parts are so related as to prevent chattering of the armature.

Another object of the invention is to provide a duplex core so arrangedthat there will be a mutual attraction between the two irrespective ofthe character of current passing through the solenoid or magnet.

A further object of the invention is the manner of mounting one of thecores so that the action thereof can be accurately regulated.

With these and other objects in view the invention consists in theconstruction, combination and arrangement of parts as will behereinafter more fully described, illustrated in the accompanyingdrawings and pointed out in the claim hereunto appended.

In the drawings:--

Figure 1 is a vertical sectional view of the sounder in normal position.

Fig. 2 is a similar view showing the parts in active position.

Fig. 3 is a top plan view of the sounder.

In the drawings the numeral 1 designates a base of any suitableinsulating material having mounted thereon the spool 2 also composed ofinsulating material. This spool 2 carries the usual winding 3 and thisspool 2 has in turn mounted thereon a bracket 4. In counter-distinctionto the usual core I provide a duplex core 5 one member 6 of which ismounted for slidable movement while the other member 7 thereof is heldfixed by means of a screw 8 pass- Specification of Letters Patent.

Patented May, 7, 1918.

Application filed February 12,1916. Serial No. 77,928.

ing upwardly through the base 1 and entering the member 7 The member 6is provided with a threaded shank 9 passing through the bracket 4: andthis threaded shank 9 has mounted thereon a pair of adjusting nuts 10cooperating with the bracket 4: for limiting the upward movement of themember 6 the second pair of nuts 11 cooperating with the top surface ofthe bracket for limiting the movement of the member 6 within the spool 2in a resilient manner. This is readily accomplished by encircling thatportion of the shank 9 between the nuts 11 and the bracket 4 with aspring 12.

.By constructing a sounder as set forth each time there is a reversal ofcurrent the magnetism of the members 6 and 7 will change with the resultthat there will always be an attraction between the members for causinga telegraphic sound to be given, and this action is accurately regulatedby means of the spring and nuts. It is to be understood that theresidual magnetism in the members will be great enough to hold the samein contact during the passage from a positive to a negativeelectrification.

From the foregoing description taken in connection with the accompanyingdrawings it should be apparent that I have provided a device which isadmirably adapted for the purpose for which it is intended, that thedevice is simple, durable and efficient of construction, and that thedevice may be manufactured and sold at a comparatively low cost. I alsodesire it to be understood that I do not desire to be limited to the useof the device in telegraph systems as the same may be as eifectivelyused as a circuit closure for alternating current.

The changes in the form, proportion and minor details of constructionmay be made within the scope of the claim without departing from thespirit or sacrificing any of the advantages of the invention.

What I claim is:-

A telegraph sounder for use with alternating currents comprising anon-conductive base, a vertical solenoid connected to

